Curing oven

Abstract

The invention discloses a curing oven which comprises an oven body, a conveying device, an air inlet device and an air outlet device. A curing channel is defined in the furnace body. The conveying device is configured to be a loading device for conveying the battery pieces in the curing channel in the first direction. The air inlet device comprises a fan, a heater, an air inlet box body and a splitter plate, the air inlet box body is arranged on one side of the curing channel, the air inlet box body is provided with an air inlet cavity, the fan is communicated with the air inlet cavity, the heater is configured to heat gas conveyed to the air inlet box body, the splitter plate covers an outlet of the air inlet cavity, and the outlet of the air inlet cavity is communicated with the curing channel; the splitter plate is provided with a first perforation part, a plurality of first air holes are distributed in the first perforation part in the vertical direction, and the perforation rate of the upper portion of the first perforation part is smaller than that of the lower portion of the first perforation part. And the air outlet device comprises an air outlet box body, and the air outlet box body is provided with an air outlet cavity communicating with the curing channel. The temperature difference of the loading device in the vertical direction is small so as to reduce warping of the battery piece, and curing is more complete and uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell curing equipment, and in particular to a curing furnace. Background Art

[0002] The curing oven is a device for curing. The battery cells also need to be cured in the production process of the battery cells. The curing method of the battery cells is as follows: print the paste or glue on the surface of the battery cells, and use the curing oven to cure the paste and fit it tightly to the battery cells.

[0003] When the curing furnace of the prior art is working, the loading device carrying the battery cells is transported from the entrance of the curing furnace through rollers. Gates are set at the entrance and exit of the curing furnace to reduce the heat conduction from the loading device into the environment. A plurality of hot air channels are set in the curing furnace. The hot air channels are composed of an air inlet pipe, and a heater is set on the air inlet pipe. The hot air is evenly flowed through the loading device through a mesh plate, and then flows through the outlet orifice plate and converges to the outlet pipe, thereby heating and curing the battery cells in the loading device.

[0004] Since the holes on the diverter plate of the curing furnace in the prior art are evenly arranged, the rising hot air causes a large temperature difference in the vertical direction of the loading device, resulting in large warping (large deformation) of the battery cell, affecting the subsequent processes of the battery cell. Summary of the invention

[0005] The embodiment of the present invention provides a curing furnace to solve the technical problem that the holes on the diverter plate of the curing furnace in the prior art are evenly arranged, and the rising hot air causes a large temperature difference in the vertical direction of the loading device, resulting in a large warping of the battery cell.

[0006] In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a curing furnace, comprising:

[0007] a furnace body, the interior of which defines a curing passage;

[0008] A conveying device configured as a loading device for conveying the battery sheet in the curing channel along a first direction;

[0009] An air inlet device, comprising a fan, a heater, an air inlet box and a diverter plate, wherein the air inlet box is arranged at one side of the curing channel, the air inlet box has an air inlet cavity, the fan is connected to the air inlet cavity, the heater is configured to heat the gas delivered to the air inlet box, the diverter plate covers the outlet of the air inlet cavity, the outlet of the air inlet cavity is connected to the curing channel, the diverter plate has a first perforated portion, the first perforated portion has a plurality of first air holes distributed in a vertical direction, and the perforation rate of the upper portion of the first perforated portion is less than the perforation rate of the lower portion thereof; and

[0010] The air outlet device comprises an air outlet box body, wherein the air outlet box body is arranged at the other side of the curing channel and is opposite to the air inlet box body, and the air outlet box body has an air outlet cavity communicated with the curing channel.

[0011] In some embodiments, a first transverse partition is provided in the air inlet box, the first transverse partition divides the air inlet cavity into an upper air inlet chamber and a lower air inlet chamber, the air inlet device also includes a first diverter pipe and an air inlet pipe, the first diverter pipe has a diverter pipe inlet and a first upper diverter interface and a first lower diverter interface connected to the diverter pipe inlet, the diverter pipe inlet is connected to the fan through the air inlet pipe, and the first upper diverter interface and the first lower diverter interface are respectively connected to the upper air inlet chamber and the lower air inlet chamber;

[0012] The splitter plate further has a second perforated portion, wherein the second perforated portion has a plurality of second air holes distributed in a vertical direction, and the perforation rate of the upper portion of the second perforated portion is less than the perforation rate of the lower portion thereof;

[0013] The first perforated portion and the second perforated portion cover the upper air inlet chamber and the lower air inlet chamber respectively, and a perforation rate of the first perforated portion is smaller than a perforation rate of the second perforated portion.

[0014] In some embodiments, a first filter plate is provided in the air inlet box, the first filter plate is longitudinally arranged to cover the longitudinal section of the air inlet cavity, the gas in the air inlet cavity flows along a first flow direction, and the first filter plate is perpendicular to the first flow direction so that the gas in the air inlet cavity passes through the first filter plate.

[0015] In some embodiments, the air inlet device and the air outlet device are respectively distributed in a plurality in a straight line in the first direction, and each of the air inlet boxes and each of the air outlet boxes are arranged opposite to each other in a second direction, and the second direction is perpendicular to the first direction;

[0016] The curing channel is configured to have a plurality of curing chambers, the plurality of curing chambers are linearly distributed along the first direction, and each of the curing chambers is formed between each of the air inlet boxes and each of the air outlet boxes.

[0017] In some embodiments, in a first direction, the nth air outlet device is connected to the fan of the (n+1)th air inlet device, so that the gas is transported from the nth air outlet device to the (n+1)th air inlet device to circulate the gas, and n is a positive integer;

[0018] In the first direction, the fan of the first air inlet device is connected to the outside, and the last air outlet device is connected to the exhaust pipe.

[0019] In some embodiments, the nth air outlet device is connected to the fan of the (n+1)th air inlet device through a burner and a cooling device in sequence;

[0020] The burner is configured to burn the gas discharged by the air outlet device to remove organic matter in the gas;

[0021] The cooling device is configured to cool the gas exhausted from the burner and to intercept the product after the combustion of the organic matter.

[0022] In some embodiments, the air outlet device further includes a second filter plate, which is longitudinally arranged and covers the inlet of the air outlet cavity, so that the gas entering the air outlet cavity passes through the second filter plate.

[0023] In some embodiments, a second transverse partition is provided in the air outlet box body, and the second transverse partition divides the air outlet cavity into an upper air outlet chamber and a lower air outlet chamber. The air outlet device also includes a second shunt pipe and an air outlet pipe, and the second shunt pipe has a shunt pipe outlet and a second upper shunt interface and a second lower shunt interface connected to the shunt pipe outlet, and the second upper shunt interface and the second lower shunt interface are connected to the upper air outlet chamber and the lower air outlet chamber respectively;

[0024] The upper air outlet chamber and the lower air outlet chamber are respectively arranged opposite to the upper air inlet chamber and the lower air inlet chamber;

[0025] In the vertical direction, the second upper flow-dividing interface is higher than the first upper flow-dividing interface, and the second lower flow-dividing interface is higher than the first lower flow-dividing interface.

[0026] In some embodiments, the air inlet box body is provided with a first baffle and a second baffle, and the air outlet box body is provided with a third baffle and a fourth baffle;

[0027] The first baffle and the second baffle are respectively arranged opposite to the first upper flow-dividing interface and the first lower flow-dividing interface;

[0028] The third baffle and the fourth baffle are arranged opposite to the second upper flow-dividing interface and the second lower flow-dividing interface.

[0029] In some embodiments, the curing oven further comprises:

[0030] A control device, each of the heaters and / or each of the cooling devices is connected to the control device to control the temperature of each of the curing chambers; each of the fans is connected to the control device to control the wind pressure of each of the curing chambers.

[0031] In some embodiments, the curing oven further comprises:

[0032] A first door panel, movably disposed on the furnace body, wherein the first door panel is configured to open or close the entrance of the curing channel;

[0033] The second door panel is movably arranged on the furnace body, and the second door panel is configured to open or close the outlet of the curing channel.

[0034] The implementation of the embodiment of the present invention has the following beneficial effects: the curing furnace covers the outlet of the air inlet cavity with the diverter plate, the diverter plate has a first perforated portion, the first perforated portion has a plurality of first air holes distributed in the vertical direction, and the perforation rate of the upper portion of the first perforated portion is smaller than that of the lower portion, the larger the perforation rate, the larger the area through which the gas can pass, and the larger the air volume; the air volume of the lower portion of the first perforated portion is larger than that of the upper portion, the hot air of the lower portion rises to supplement the upper portion, so that the temperature difference of the loading device in the vertical direction is small, so as to reduce the warping of the battery cell, and the curing is more complete and uniform. In addition, the rising of the hot air and the difference in air volume in the vertical direction further make the battery cell (thin and light) suspended, reducing the warping of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of a first embodiment of a curing furnace of the present invention;

[0036] Figure 2 is along Figure 1 Sectional view along line AA;

[0037] Figure 3 yes Figure 2 Working diagram of

[0038] Figure 4 is along Figure 1 Sectional view along the midline BB;

[0039] Figure 5 is along Figure 1 Sectional view of the mid-CC line;

[0040] Figure 6 It is another structural schematic diagram of the first embodiment of a curing furnace of the present invention;

[0041] Figure 7 is along Figure 6 Sectional view along line DD.

[0042] Description of Figure Numbers:

[0043] 100, furnace body; 110, curing channel; 111, curing chamber; 200, conveying device; 210, frame; 220, roller; 300, air inlet device; 310, fan; 320, heater; 330, air inlet box; 331, air inlet cavity; 3311, upper air inlet chamber; 3312, lower air inlet chamber; 332, first transverse partition; 333, first filter plate; 334, first baffle; 335, second baffle; 340, diverter plate; 341, first perforated portion; 3411, first air vent; 342, second perforated portion; 3421, second air vent; 350, first diverter pipe; 351, diverter pipe inlet; 352, second diverter pipe inlet; 353, first diverter pipe inlet; 354, first diverter pipe inlet; 355, first diverter pipe inlet; 356, first diverter pipe inlet; 357, first diverter pipe inlet; 358, first diverter pipe inlet; 359, first diverter pipe inlet; 360, first diverter pipe inlet; 361, first diverter pipe inlet; 362, second diverter pipe inlet; 363, first diverter pipe inlet; 364, first diverter pipe inlet; 365, first diverter pipe inlet; 366, first diverter pipe inlet; 367, first diverter pipe inlet; 368, first diverter pipe inlet; 369, first diverter pipe inlet; 370, first diverter pipe inlet; 371, first diverter pipe inlet; 372, second diverter pipe inlet; 373, first di 2. The first upper shunt interface; 353. The first lower shunt interface; 360. The air inlet pipe; 400. The air outlet device; 410. The air outlet box; 411. The air outlet cavity; 4111. The upper air outlet chamber; 4112. The lower air outlet chamber; 412. The third baffle; 413. The fourth baffle; 420. The second filter plate; 430. The second transverse partition; 440. The second shunt pipe; 441. The shunt pipe outlet; 442. The second upper shunt interface; 443. The second lower shunt interface; 450. The air outlet pipe; 500. The burner; 600. The cooling device; 700. The first door panel; 800. The second door panel; 900. The loading device; 910. The battery cell. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. Unless otherwise specified, "plurality" means two or more.

[0047] The meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0048] With regard to the curing furnace in the prior art, since the holes on the diverter plate are evenly arranged, the air volume is equal at each location in the vertical direction. The rising hot air causes a large temperature difference in the vertical direction of the battery cell 910 loading device 900, resulting in large warping (large deformation) of the battery cell 910, incomplete curing, and uneven curing.

[0049] like Figures 1 to 7 As shown, an embodiment of the present invention provides a curing furnace, including a furnace body 100, a conveying device 200, an air inlet device 300 and an air outlet device 400. One application of the curing furnace of the present invention is curing of a cell 910. The cell 910 is specifically a photovoltaic cell 910.

[0050] like Figure 2 As shown, the interior of the furnace body 100 defines a curing channel 110. Optionally, the two sides of the furnace body 100 are respectively closed by the air inlet device 300 and the air outlet device 400, and the top side of the furnace body 100 is closed by the top plate of the furnace body 100, and an inlet and an outlet are formed at both ends of the furnace body 100 for the loading device 900 of the battery cell 910 to enter and exit.

[0051] like Figure 1 As shown, the conveying device 200 is configured as a loading device 900 for conveying a battery sheet 910 in a curing channel 110 along a first direction. Optionally, the conveying device 200 is a roller 220 conveyor, which includes a frame 210, a plurality of rollers 220 arranged on the frame 210 at intervals along the first direction, and a first driving device, and the first driving device is connected to the plurality of rollers 220 by power to drive the rollers 220 to rotate. The first driving device is preferably a motor, and a driving sprocket is provided on the output shaft of the motor, and both ends of each roller 220 are rotatably connected to both sides of the frame 210, and one end of each roller 220 is provided with a driven sprocket, and the driving sprocket and the plurality of driven sprockets are connected by a transmission chain, so that the motor drives the plurality of rollers 220 to rotate synchronously through a sprocket transmission, and the loading device 900 is conveyed. It should be noted that the conveying device 200 of the present invention is not limited to a roller 220 conveyor, and can also be a belt conveyor, a plate chain conveyor, a mesh belt conveyor or a chain conveyor.

[0052] The loading device 900 may be a basket for the battery cells 910, or other devices capable of loading the battery cells 910. When there are multiple battery cells 910, the multiple battery cells 910 are generally stacked in a vertical direction and placed on the loading device 900.

[0053] like Figure 2 and Figure 4 As shown, the air inlet device 300 includes a fan 310, a heater 320, an air inlet box 330 and a diverter plate 340. The air inlet box 330 is disposed at one side of the curing channel 110. The air inlet box 330 has an air inlet cavity 331. The fan 310 is connected to the air inlet cavity 331. The heater 320 is configured to heat the gas delivered to the air inlet box 330. Optionally, the heater 320 is arranged at a position where the gas passes when being delivered from the fan 310 to the air inlet box 330. Preferably, the heater 320 is disposed in the air inlet pipe 360.

[0054] like Figure 2 As shown, the air outlet device 400 includes an air outlet box 410 having an air outlet cavity 411 connected to the curing channel 110 . The air outlet box 410 is disposed on the other side of the curing channel 110 and opposite to the air inlet box 330 .

[0055] Among them, Figure 2 , Figure 3 and Figure 7 As shown, the diverter plate 340 covers the outlet of the air inlet cavity 331, and the outlet of the air inlet cavity 331 is connected to the curing channel 110. The diverter plate 340 has a first perforated portion 341, and the first perforated portion 341 has a plurality of first air holes 3411 distributed in the vertical direction, and the perforation rate of the upper part of the first perforated portion 341 is less than the perforation rate of the lower part thereof. The upper and lower parts of the first perforated portion 341 are generally divided by the center line of the first perforated portion 341. It should be understood that the upper and lower parts of the first perforated portion 341 can also be divided by other positions, that is, the upper and lower parts of the first perforated portion 341 are not necessarily equally divided.

[0056] In more detail, the term "perforation ratio" refers to the ratio of the sum of the perforation areas (multiple first air holes 3411) to the total area of ​​the plate (dividing plate 340). Figure 3 As shown, the greater the perforation rate, the greater the area through which the gas can pass, and the greater the air volume; the air volume at the lower part of the first perforated portion 341 is greater than the air volume at the upper part, and the hot air at the lower part rises to supplement the upper part, so that the temperature difference of the loading device 900 in the vertical direction is small, so as to reduce the warping of the battery cell 910, and the curing is more complete and uniform. In addition, due to the rising hot air and the difference in air volume in the vertical direction, the hot air volume at the lower part is larger than that at the upper part, so that the hot air rises faster, further making the battery cell 910 (thin and light) suspended, reducing the warping of the battery cell 910.

[0057] In some embodiments, in order to isolate the curing channel 110 from the outside world, Figure 1 As shown, the curing oven further includes a first door panel 700 and a second door panel 800. The first door panel 700 is movably disposed on the oven body 100, and the first door panel 700 is configured to open or close the entrance of the curing passage 110. The second door panel 800 is movably disposed on the oven body 100, and the second door panel 800 is configured to open or close the exit of the curing passage 110. The first door panel 700 and the second door panel 800 can be configured to be controlled by a second drive device, and the second drive device can be an electric drive device, a pneumatic drive device, or a hydraulic drive device.

[0058] The loading device 900 has a certain height. In order to make the temperature difference between the upper, middle and lower parts of the loading device 900 smaller, as shown in FIG. Figure 2 As shown, a first transverse partition 332 is provided in the air inlet box 330, and the first transverse partition 332 divides the air inlet cavity 331 into an upper air inlet chamber 3311 and a lower air inlet chamber 3312 which are independent of each other. The air inlet device 300 also includes a first diverter pipe 350 and an air inlet pipe 360. The first diverter pipe 350 has a diverter pipe inlet 351 and a first upper diverter interface 352 and a first lower diverter interface 353 connected to the diverter pipe inlet 351. The diverter pipe inlet 351 is connected to the fan 310 through the air inlet pipe 360. The first upper diverter interface 352 and the first lower diverter interface 353 are respectively connected to the upper air inlet chamber 3311 and the lower air inlet chamber 3312, so that the gas exhausted by the fan 310 is respectively input into the upper air inlet chamber 3311 and the lower air inlet chamber 3312 through the first upper diverter interface 352 and the first lower diverter interface 353.

[0059] The splitter plate 340 also has a second perforated portion 342, and the second perforated portion 342 has a plurality of second air holes 3421 distributed in the vertical direction, and the perforation rate of the upper portion of the second perforated portion 342 is less than the perforation rate of the lower portion thereof. The upper and lower portions of the second perforated portion 342 are generally divided by the midline of the second perforated portion 342. It should be understood that the upper and lower portions of the second perforated portion 342 may also be divided by other positions, that is, the upper and lower portions of the second perforated portion 342 are not necessarily equally divided.

[0060] The first perforated portion 341 and the second perforated portion 342 respectively cover the upper air inlet chamber 3311 and the lower air inlet chamber 3312. The perforation rate of the first perforated portion 341 is smaller than that of the second perforated portion 342. Similarly, the output air volume of the second perforated portion 342 located at the bottom is larger than the output air volume of the first perforated portion 341 located at the top. Combined with the phenomenon of rising hot air, the temperature difference among the upper, middle and lower parts of the loading device 900 is smaller.

[0061] In some embodiments, the areas of the first air holes 3411 are the same, and the density of the first air holes 3411 in the upper part of the first perforated portion 341 is less than the density of the first air holes 3411 in the lower part thereof. And / or, the areas of the second air holes 3421 are the same, and the density of the second air holes 3421 in the upper part of the second perforated portion 342 is less than the density of the second air holes 3421 in the lower part thereof. Here, "density" refers to the number of air holes per unit area.

[0062] like Figure 2 As shown, in some embodiments, a first filter plate 333 is provided in the air inlet box 330, and the first filter plate 333 is longitudinally arranged to cover the longitudinal section of the air inlet cavity 331. The gas in the air inlet cavity 331 flows along the first flow direction, and the first filter plate 333 is perpendicular to the first flow direction, so that the gas in the air inlet cavity 331 passes through the first filter plate 333. Optionally, the first filter plate 333 is a porous structure plate (such as a ceramic filter plate), and its interior is covered with criss-cross and mutually interpenetrating capillary pores (diameter of about 0.1 to 100 microns). The first filter plate 333 is a detachable structure to facilitate cleaning or replacement. The first filter plate 333 can filter impurities in the hot air and make the wind more uniform.

[0063] In some embodiments, Figure 4 As shown, there are multiple air inlet devices 300 and air outlet devices 400 linearly distributed in the first direction, and each air inlet box 330 and each air outlet box 410 are arranged opposite to each other in the second direction, and the second direction is perpendicular to the first direction.

[0064] The curing channel 110 is configured to have a plurality of curing chambers 111, which are linearly distributed along the first direction, and each curing chamber 111 is formed between each air inlet box 330 and each air outlet box 410. By providing a plurality of curing chambers 111, the temperature of each curing chamber 111 can be adjusted according to process requirements. Optionally, along the first direction, the temperature change of the plurality of curing chambers 111 is set to increase first and then decrease, so that the input battery cell 910 is gradually heated up to avoid excessive temperature rise; at the same time, the output battery cell 910 and the slurry on the battery cell 910 are prevented from being rapidly cooled, resulting in deformation of the battery cell 910.

[0065] In some embodiments, Figure 2 As shown, the air outlet device 400 further includes a second filter plate 420, which is arranged longitudinally and covers the entrance of the air outlet cavity 411, so that the gas entering the air outlet cavity 411 passes through the second filter plate 420. When the hot air passes through the curing chamber 111 to cure the slurry, a certain amount of volatile organic matter or dust will be volatilized, and the dust will be filtered by the second filter plate 420 and remain on the second filter plate 420.

[0066] Optionally, the second filter plate 420 is a porous structure plate (eg, a ceramic filter plate), the interior of which is covered with interlaced, interconnected capillary pores (diameter of about 0.1 to 100 microns). The second filter plate 420 is a detachable structure for easy cleaning or replacement.

[0067] In some embodiments, Figure 2 As shown, a second transverse partition 430 is provided in the air outlet box 410, and the second transverse partition 430 divides the air outlet cavity 411 into an upper air outlet chamber 4111 and a lower air outlet chamber 4112 which are independent of each other. The air outlet device 400 also includes a second diverter pipe 440 and an air outlet pipe 450. The second diverter pipe 440 has a diverter pipe outlet 441 and a second upper diverter interface 442 and a second lower diverter interface 443 connected to the diverter pipe outlet 441. The second upper diverter interface 442 and the second lower diverter interface 443 are respectively connected to the upper air outlet chamber 4111 and the lower air outlet chamber 4112. The upper air outlet chamber 4111 and the lower air outlet chamber 4112 are respectively arranged opposite to the upper air inlet chamber 3311 and the lower air inlet chamber 3312.

[0068] like Figure 2 As shown, in the vertical direction, the second upper shunt interface 442 is higher than the first upper shunt interface 352 , and the second lower shunt interface 443 is higher than the first lower shunt interface 353 , so that the hot air has an upward velocity component in the curing chamber 111 to lift the battery cell 910 .

[0069] In some embodiments, Figure 2 As shown, the air inlet box 330 is provided with a first baffle 334 and a second baffle 335, and the air outlet box 410 is provided with a third baffle 412 and a fourth baffle 413. Optionally, the first baffle 334 and the second baffle 335 are fixed in the air inlet box 330 by means of a first bracket and a second bracket, respectively, and the third baffle 412 and the fourth baffle 413 are fixed in the air outlet box 410 by means of a third bracket and a fourth bracket, respectively.

[0070] The first baffle 334 and the second baffle 335 are respectively disposed opposite to the first upper flow-dividing interface 352 and the first lower flow-dividing interface 353. The third baffle 412 and the fourth baffle 413 are respectively disposed opposite to the second upper flow-dividing interface 442 and the second lower flow-dividing interface 443.

[0071] The first baffle 334 , the second baffle 335 , the third baffle 412 and the fourth baffle 413 can prevent the hot air from converging through the battery cell 910 , thereby preventing local curing defects of the battery cell 910 and achieving more uniform curing.

[0072] In some embodiments, the curing furnace also includes a control device, such as a PLC controller. Each heater 320 and / or each cooling device 600 is connected to the control device to control the temperature of each curing chamber 111 to achieve the best curing effect. Exemplarily, during the curing process, the slurry on the battery cell 910 expands due to heat, and the battery cell 910 is in the shape of an arch bridge in the curing chamber 111. By controlling the temperature of each curing chamber 111, the temperature and time curve requirements for the curing of the slurry can be met, and the appropriate temperature drop can be adjusted at the outlet of the curing furnace to avoid the battery cell 910 and the slurry from cooling rapidly and causing the battery cell 910 to deform.

[0073] Each fan 310 is connected to a control device to control the wind pressure of each curing chamber 111. By controlling the wind volume and wind pressure, it can be ensured that the battery cell 910 is basically in a suspended state in the loading device 900.

[0074] In some embodiments, Figure 6 As shown, in the first direction, the nth air outlet device 400 (through the air outlet pipe 450) is connected to the fan 310 of the (n+1)th air inlet device 300, so that the gas is transported from the nth air outlet device 400 (through the air outlet pipe 450) to the (n+1)th air inlet device 300 to circulate the gas. n is a positive integer, such as 1, 2, 3, 4, etc.

[0075] In the first direction, the fan 310 of the first air inlet device 300 is connected to the outside to inhale the outside air, and the last air outlet device 400 is connected to the exhaust pipe to discharge the exhaust gas.

[0076] Compared with the heating furnace in the prior art which only recycles the hot air from the two curing chambers 111 , the present invention can realize multiple recycling cycles of the hot air, which is more energy-efficient.

[0077] Exemplarily, in the first direction, the first air outlet device 400 is connected to the fan 310 of the second air inlet device 300, the second air outlet device 400 is connected to the fan 310 of the third air inlet device 300, and so on.

[0078] In some embodiments, Figure 6 As shown, the nth air outlet device 400 sequentially passes through the burner 500 and the cooling device 600 and is connected to the fan 310 of the (n+1)th air inlet device 300. Specifically, the air outlet pipe 450 of the air outlet device 400 is connected to the inlet of the burner 500, the outlet of the burner 500 is connected to the inlet of the cooling device 600 through the first circulation pipeline, and the outlet of the cooling device 600 is connected to the inlet of the fan 310 through the second circulation pipeline.

[0079] Since hot air will volatilize certain volatile organic matter when curing the slurry through the curing chamber 111, the burner 500 is configured to burn the exhaust gas of the air outlet device 400 to remove the organic matter in the gas. The burner 500 is mainly used to burn the above volatile organic matter, but its treatment object is not limited to volatile organic matter.

[0080] The cooling device 600 is configured to cool the exhaust gas of the burner 500 and trap the product after the combustion of organic matter.

[0081] To sum up, in some embodiments, the working principle of the curing furnace of the present invention is as follows: the loading device 900 loaded with the battery cell 910 is input into the curing channel 110 through the entrance of the curing channel 110, the plane of the battery cell 910 is printed with slurry, and the loading device 900 is transported along the first direction by the conveying device 200.

[0082] The fan 310 filters the air and then enters the air inlet pipe 360. The air is heated by the heater 320 to form hot air. The hot air is filtered by the first filter plate 333 and then diverted to various positions of the curing chamber 111 by the diverter plate 340. Since the hot air will rise upward, in order to ensure that the air volume in the vertical direction of the loading device 900 is as consistent as possible, the air holes of the diverter plate 340 are set to be dense at the bottom and sparse at the top (the perforation rate of the first perforated part 341 is less than the perforation rate of the second perforated part 342). Since the upper air inlet chamber 3311 and the lower air inlet chamber 3312 are separated by the first transverse partition 332, the air holes of the first perforated portion 341 and the second perforated portion 342 on the upper cover of the upper air inlet chamber 3311 and the lower air inlet chamber 3312 are also arranged to be dense at the bottom and sparse at the top (the perforation rate of the upper part of the first perforated portion 341 is smaller than that of the lower part, and the perforation rate of the upper part of the second perforated portion 342 is smaller than that of the lower part), so that the air volume below the loading device 900 is greater than the air volume above it. At the same time, in the vertical direction, the second upper shunt interface 442 is higher than the first upper shunt interface 352, and the second lower shunt interface 443 is higher than the first lower shunt interface 353 (the height difference is preferably 5-100mm). By adding the first baffle 334, the second baffle 335, the third baffle 412 and the fourth baffle 413, the hot air is prevented from converging through the battery cell 910, and the local curing defects of the battery cell 910 are avoided. The curing is more uniform, and the hot air has an upward velocity component in the curing chamber 111, so that the battery cell 910 can be lifted to reduce the curing warping (deformation) of the battery cell 910. By controlling the air volume and air pressure, the battery cell 910 can be guaranteed to be uniform. The cell sheet 910 is basically in a suspended state in the loading device 900. During the curing process, the slurry on the cell sheet 910 expands due to the heat, and the cell sheet 910 is in an arch shape in the curing chamber 111. By controlling the temperature of each curing chamber 111, the temperature and time curve requirements for the curing of the slurry can be met, and a suitable temperature drop can be adjusted at the outlet of the curing furnace to avoid rapid cooling of the cell sheet 910 and the slurry, which would cause the cell sheet 910 to deform. When the cell sheet 910 is cured and exits the curing chamber 111, it is affected by the gravity of the cell sheet 910 and becomes concave on the loading device 900, thereby reducing the warping of the cell sheet 910 during the curing process.

[0083] When the hot air passes through the curing chamber 111 to cure the slurry, a certain amount of volatile organic matter or dust will be volatilized. After the dust is filtered through the second filter plate 420, it will remain on the second filter plate 420 for regular cleaning. After the volatile organic matter is burned by the burner 500, it will be cooled and remain in the cooling device 600 for regular cleaning, or remain on the first filter plate 333 for air intake. The volatile organic matter and dust can be completely removed through triple filtration to prevent the battery cell 910 from being contaminated.

[0084] Since the temperature of each curing chamber 111 is different, the temperature of each curing chamber 111 can be controlled by cooperating with the cooling device 600 and the heater 320 as needed to achieve the best curing requirements. Since hot air curing is adopted, the hot air is fully mixed after passing through the first filter plate 333 to ensure that the temperature is consistent everywhere, the battery cell 910 and the slurry are heated evenly, deformation is reduced and the curing effect is improved. An independent fan 310 is installed in each separate curing chamber 111 to ensure that the wind pressure in each curing chamber 111 is consistent, to avoid cross-wind that affects the flow field, and to ensure the curing effect.

[0085] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A curing oven, characterized in that: include: a furnace body, the interior of which defines a curing passage; A conveying device configured as a loading device for conveying the battery sheet in the curing channel along a first direction; An air inlet device, comprising a fan, a heater, an air inlet box and a diverter plate, wherein the air inlet box is arranged at one side of the curing channel, the air inlet box has an air inlet cavity, the fan is connected to the air inlet cavity, the heater is configured to heat the gas delivered to the air inlet box, the diverter plate covers the outlet of the air inlet cavity, the outlet of the air inlet cavity is connected to the curing channel, the diverter plate has a first perforated portion, the first perforated portion has a plurality of first air holes distributed in a vertical direction, and the perforation rate of the upper portion of the first perforated portion is less than the perforation rate of the lower portion thereof; and The air outlet device comprises an air outlet box body, wherein the air outlet box body is arranged at the other side of the curing channel and is opposite to the air inlet box body, and the air outlet box body has an air outlet cavity communicated with the curing channel.

2. The curing oven according to claim 1, characterized in that A first transverse partition is provided in the air inlet box, and the first transverse partition divides the air inlet cavity into an upper air inlet chamber and a lower air inlet chamber. The air inlet device also includes a first shunt pipe and an air inlet pipe, the first shunt pipe has a shunt pipe inlet and a first upper shunt interface and a first lower shunt interface connected to the shunt pipe inlet, the shunt pipe inlet is connected to the fan through the air inlet pipe, and the first upper shunt interface and the first lower shunt interface are respectively connected to the upper air inlet chamber and the lower air inlet chamber; The splitter plate further has a second perforated portion, wherein the second perforated portion has a plurality of second air holes distributed in a vertical direction, and the perforation rate of the upper portion of the second perforated portion is less than the perforation rate of the lower portion thereof; The first perforated portion and the second perforated portion cover the upper air inlet chamber and the lower air inlet chamber respectively, and a perforation rate of the first perforated portion is smaller than a perforation rate of the second perforated portion.

3. The curing oven according to claim 1, characterized in that: A first filter plate is provided in the air inlet box, and the first filter plate is longitudinally arranged to cover the longitudinal section of the air inlet cavity. The gas in the air inlet cavity flows along a first flow direction, and the first filter plate is perpendicular to the first flow direction so that the gas in the air inlet cavity passes through the first filter plate.

4. The curing oven according to claim 1, characterized in that: The air inlet devices and the air outlet devices are respectively distributed in a plurality in a straight line in the first direction, and each of the air inlet boxes is arranged opposite to each of the air outlet boxes in a second direction, and the second direction is perpendicular to the first direction; The curing channel is configured to have a plurality of curing chambers, the plurality of curing chambers are linearly distributed along the first direction, and each of the curing chambers is formed between each of the air inlet boxes and each of the air outlet boxes.

5. The curing oven according to claim 4, characterized in that: In a first direction, the nth air outlet device is connected to the fan of the (n+1)th air inlet device, so that the gas is transported from the nth air outlet device to the (n+1)th air inlet device to circulate the gas, where n is a positive integer; In the first direction, the fan of the first air inlet device is connected to the outside, and the last air outlet device is connected to the exhaust pipe.

6. The curing oven according to claim 5, characterized in that The nth air outlet device is connected to the fan of the (n+1)th air inlet device through the burner and the cooling device in sequence; The burner is configured to burn the gas discharged by the air outlet device to remove organic matter in the gas; The cooling device is configured to cool the gas exhausted from the burner and to intercept the product after the combustion of the organic matter.

7. The curing oven according to any one of claims 1 to 6, characterized in that The air outlet device further includes a second filter plate, which is arranged longitudinally and covers the inlet of the air outlet cavity, so that the gas entering the air outlet cavity passes through the second filter plate.

8. The curing oven according to claim 2, characterized in that: A second transverse partition is provided in the air outlet box body, and the second transverse partition divides the air outlet cavity into an upper air outlet chamber and a lower air outlet chamber. The air outlet device also includes a second shunt pipe and an air outlet pipe, and the second shunt pipe has a shunt pipe outlet and a second upper shunt interface and a second lower shunt interface connected to the shunt pipe outlet, and the second upper shunt interface and the second lower shunt interface are connected to the upper air outlet chamber and the lower air outlet chamber respectively; The upper air outlet chamber and the lower air outlet chamber are respectively arranged opposite to the upper air inlet chamber and the lower air inlet chamber; In the vertical direction, the second upper flow-dividing interface is higher than the first upper flow-dividing interface, and the second lower flow-dividing interface is higher than the first lower flow-dividing interface.

9. The curing oven according to claim 8, characterized in that The air inlet box body is provided with a first baffle and a second baffle, and the air outlet box body is provided with a third baffle and a fourth baffle; The first baffle and the second baffle are respectively arranged opposite to the first upper flow-dividing interface and the first lower flow-dividing interface; The third baffle and the fourth baffle are arranged opposite to the second upper flow-dividing interface and the second lower flow-dividing interface.

10. The curing oven according to claim 6, characterized in that: Also includes: A control device, each of the heaters and / or each of the cooling devices is connected to the control device to control the temperature of each of the curing chambers; each of the fans is connected to the control device to control the wind pressure of each of the curing chambers.

11. The curing oven according to any one of claims 1 to 6, characterized in that: Also includes: A first door panel, movably disposed on the furnace body, wherein the first door panel is configured to open or close the entrance of the curing channel; The second door panel is movably arranged on the furnace body, and the second door panel is configured to open or close the outlet of the curing channel.

Images